The Crimson Stain Mystery

In attempting to develop a chemical which would make a person super-intelligent, Dr. Montrose fails and the subjects of his experiments metamorphose into hideous monsters who band together and prey on humans. With the police stymied, a young detective attempts to track down the leader of the group of killers, known only to have a small crimson stain in one eye.

• T. Hayes HunterDirector
• Albert Payson TerhuneWriter

• Maurice CostelloHarold Stanley
• Ethel GrandinFlorence Montrose
• Thomas J. McGraneDr. Burton Montrose
• Olga OlonovaVanya Tosca
• William CavanaughDoctor's Assistant
• John A. MiltonLayton Parrish (as John Milton)
• N.J. ThompsonJim Tanner
• Eugene StrongRobert Clayton
• Lorna VolareLittle girl